Islampur Threshold Days by Year (IN012210400)

4 fixed thresholds counted per year at Islampur (IN012210400): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Islampur Thresholds

Islampur: days with 10 mm (0.39 in) or more of precipitation in 68 years, most in 1932 with 40.
Islampur: days with 25 mm (0.98 in) or more of precipitation in 67 years, most in 1932 with 17.
Islampur: days with 50 mm (1.97 in) or more of precipitation in 52 years, most in 1932 with 7.
Islampur: days with 100 mm (3.94 in) or more of precipitation in 7 years, most in 1966 with 2.
4 fixed thresholds have at least one qualifying day at Islampur.

Days with 10 mm (0.39 in) or more of precipitation

68 years with a qualifying day

Days per year at Islampur with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 40 in 1932.

Days with 10 mm (0.39 in) or more of precipitation per year at Islampur
Year	Days	Decade average
1901	26	18
1902	18	18
1903	16	18
1904	16	18
1905	11	18
1906	22	18
1907	23	18
1908	15	18
1909	15	18
1910	19	18.7
1911	11	18.7
1912	19	18.7
1913	13	18.7
1914	31	18.7
1915	24	18.7
1916	25	18.7
1917	18	18.7
1918	12	18.7
1919	15	18.7
1920	11	16.1
1921	14	16.1
1922	18	16.1
1923	14	16.1
1924	14	16.1
1925	16	16.1
1926	16	16.1
1927	19	16.1
1928	19	16.1
1929	20	16.1
1930	22	22.2
1931	26	22.2
1932	40	22.2
1933	26	22.2
1934	19	22.2
1935	19	22.2
1936	14	22.2
1937	16	22.2
1938	21	22.2
1939	19	22.2
1940	18	21.1
1941	26	21.1
1942	18	21.1
1943	21	21.1
1944	28	21.1
1945	15	21.1
1946	35	21.1
1947	18	21.1
1948	18	21.1
1949	14	21.1
1950	23	21.6
1951	13	21.6
1952	12	21.6
1953	31	21.6
1954	20	21.6
1955	25	21.6
1956	22	21.6
1957	19	21.6
1958	24	21.6
1959	27	21.6
1961	25	21.5
1962	28	21.5
1963	15	21.5
1964	25	21.5
1966	23	21.5
1967	25	21.5
1968	14	21.5
1969	17	21.5
1970	18	18

For each year, a bar from the first to the last day at Islampur meeting 10 mm (0.39 in).

First to last qualifying date each year at Islampur
Year	First date	Last date
1901	1901-01-14	1901-10-23
1902	1902-06-01	1902-12-18
1903	1903-06-07	1903-12-01
1904	1904-05-22	1904-10-29
1905	1905-04-18	1905-10-18
1906	1906-05-06	1906-12-31
1907	1907-04-22	1907-12-19
1908	1908-05-04	1908-10-28
1909	1909-05-25	1909-10-09
1910	1910-05-24	1910-11-08
1911	1911-05-16	1911-11-25
1912	1912-04-25	1912-11-23
1913	1913-05-25	1913-10-14
1914	1914-04-01	1914-11-06
1915	1915-04-23	1915-12-27
1916	1916-04-07	1916-11-10
1917	1917-04-06	1917-11-19
1918	1918-01-22	1918-11-29
1919	1919-05-13	1919-12-14
1920	1920-04-23	1920-09-27
1921	1921-04-08	1921-11-02
1922	1922-05-14	1922-11-25
1923	1923-03-05	1923-10-18
1924	1924-04-02	1924-11-04
1925	1925-03-20	1925-11-13
1926	1926-05-04	1926-12-22
1927	1927-04-27	1927-11-11
1928	1928-03-31	1928-10-26
1929	1929-04-23	1929-11-07
1930	1930-05-20	1930-11-05
1931	1931-04-02	1931-12-14
1932	1932-04-25	1932-11-18
1933	1933-05-11	1933-12-19
1934	1934-04-10	1934-11-02
1935	1935-06-12	1935-12-27
1936	1936-05-10	1936-11-15
1937	1937-04-19	1937-10-28
1938	1938-02-25	1938-11-09
1939	1939-06-07	1939-11-01
1940	1940-04-18	1940-11-28
1941	1941-01-08	1941-10-14
1942	1942-06-08	1942-10-29
1943	1943-05-19	1943-11-03
1944	1944-05-10	1944-11-03
1945	1945-05-03	1945-11-17
1946	1946-04-16	1946-11-19
1947	1947-01-01	1947-11-12
1948	1948-04-10	1948-11-22
1949	1949-05-14	1949-10-23
1950	1950-04-01	1950-10-14
1951	1951-04-19	1951-10-03
1952	1952-06-05	1952-10-10
1953	1953-04-06	1953-10-27
1954	1954-03-20	1954-12-18
1955	1955-03-08	1955-10-21
1956	1956-04-09	1956-11-24
1957	1957-04-14	1957-11-15
1958	1958-04-13	1958-10-10
1959	1959-04-14	1959-11-11
1961	1961-04-29	1961-10-29
1962	1962-05-20	1962-12-06
1963	1963-03-29	1963-10-25
1964	1964-03-26	1964-12-26
1966	1966-05-03	1966-12-04
1967	1967-04-03	1967-12-15
1968	1968-05-21	1968-10-11
1969	1969-06-14	1969-10-20
1970	1970-05-25	1970-10-06

Every Fixed Threshold

Fixed thresholds at Islampur
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
10 mm (0.39 in): Days with 10 mm or more rain	68	40	1932	18
25 mm (0.98 in): Days with 25 mm or more rain	67	17	1932	6
50 mm (1.97 in): Days with 50 mm or more rain	52	7	1932	2
100 mm (3.94 in): Days with 100 mm or more rain	7	2	1966	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1901.

Download the Data

Data for Islampur threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Islampur Threshold Days by Year (IN012210400)

Key Facts for Islampur Thresholds

Days with 10 mm (0.39 in) or more of precipitation

Every Fixed Threshold

Download the Data

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